Stirring device
By using an upper and lower counter-current airflow and a rotating blade design in the mixing device, combined with a mixing rod and a filter screen, the problem of uneven mixing of solid powder and liquid is solved, achieving efficient material mixing and improved product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SHANSHAN TECH CO LTD
- Filing Date
- 2024-12-12
- Publication Date
- 2026-05-08
AI Technical Summary
Existing mixing equipment is difficult to mix solid powders and highly viscous liquids evenly, which can easily lead to large particle agglomeration, affecting product quality and increasing processing difficulty.
The system uses two sets of propeller blades to generate opposing airflows, combined with rotating blades and mixing rods, to ensure that the material tumbles up and down and laterally within the mixing chamber. The airflow direction is adjusted by a servo motor, and large particles are screened by a filter screen and vibrator, thereby improving the mixing uniformity and product qualification rate.
It significantly improves the uniformity of material mixing, avoids large particle clumping, and improves product quality and processing efficiency.
Smart Images
Figure CN224207838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stirring device. Background Technology
[0002] With the increasing demand for fast charging performance and low-temperature resistance in lithium-ion batteries, graphite carbide anode materials manufactured using liquid-phase coating technology have gained widespread acceptance. Liquid-phase coating can form an amorphous carbon protective film on the graphite surface, effectively suppressing graphite exfoliation, pulverization, and volume expansion caused by solvation effects. It also reduces the formation of excessive SEI film during the first charge, thereby reducing adverse effects such as irreversible capacity loss and significantly improving the electrochemical performance of the anode material, including its initial coulombic efficiency and cycle stability. Liquid-phase coating can also reduce the formation of lithium dendrites, improving battery safety and preventing short circuits and thermal runaway caused by lithium dendrites.
[0003] However, a crucial step in preparing graphite anode materials using liquid-phase coating technology lies in mixing solid graphite powder with liquid asphalt and other substances. Whether the mixture is homogeneous, allowing the liquid amorphous carbon to adhere evenly to the surface of the solid powder, directly affects the quality and performance of the final product. Incomplete mixing will result in the particles sticking together, creating large particles that severely impact product quality or require additional processing steps, increasing costs. Current mixing equipment struggles to uniformly mix solid powder and highly viscous liquids, easily leading to large particle agglomeration and complicating subsequent processing steps. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the defects in the prior art and provide a stirring device.
[0005] The present invention solves the above-mentioned technical problems through the following technical solution:
[0006] A mixing device includes a mixing drum, a mixing shaft, and a feed inlet. The mixing shaft is driven to rotate by a motor. A mixing chamber is provided in the middle of the mixing drum. A first receiving cavity and a second receiving cavity communicating with the mixing chamber are respectively provided above and below the mixing chamber. The mixing shaft extends from the first receiving cavity into the second receiving cavity along the axial direction of the mixing drum. The feed inlet is communicating with the mixing chamber and is used to feed the material to be mixed into the mixing chamber.
[0007] The first accommodating cavity has a first propeller blade mounted on its stirring shaft, which is configured to generate a downward airflow when rotating; the second accommodating cavity has a second propeller blade mounted on its stirring shaft, which is configured to generate an upward airflow when rotating; and a rotating blade is mounted on the stirring shaft inside the stirring chamber.
[0008] In this design, the opposing airflow generated by the upper and lower sets of propeller blades allows the material to tumble up and down in the mixing chamber, while the rotating blade in the middle allows the material to tumble horizontally. The combination of the above structures can significantly improve the mixing uniformity of the material, so that the liquid is evenly distributed and coats the surface of the solid powder, avoiding the formation of large particles and clumping, which would affect the product quality.
[0009] Preferably, a mixing rod is provided on the inner wall of the mixing drum inside the mixing chamber, and the mixing rod extends toward the mixing shaft.
[0010] In this solution, by setting up mixing rods, large particles that agglomerate due to uneven liquid distribution during the tumbling process of materials in the mixing chamber are broken up and re-coated, thereby increasing the product qualification rate.
[0011] Preferably, the rotating blades are provided above and below the mixing bar;
[0012] And / or, the mixing bar is provided with a serrated structure.
[0013] In this solution, the above structure can further improve the effect of liquid phase coating and increase the product qualification rate.
[0014] Preferably, the second propeller blade is mounted on the stirring shaft via a mounting base, the mounting base being equipped with a servo motor, and the second propeller blade is mounted on the rotating shaft of the servo motor.
[0015] In this solution, the deflection angle of the second propeller blade can be changed by the servo motor, thereby adjusting the airflow direction generated by the second propeller blade; when the coated product needs to be discharged from the mixing chamber, the second propeller blade can be rotated to form a downward airflow to accelerate the discharge of the material.
[0016] Preferably, the bottom of the first accommodating cavity is a conical structure, and the communication port between the first accommodating cavity and the stirring chamber is located at the bottom of the conical structure;
[0017] And / or, the bottom of the mixing chamber is a conical structure, and the communication port between the mixing chamber and the second accommodating cavity is located at the bottom of the conical structure.
[0018] In this design, the conical bottom of the first accommodating chamber not only facilitates the downward flow of air generated by the first propeller blades into the mixing chamber, but also effectively prevents the powder being mixed in the mixing chamber from entering the first accommodating chamber. The conical bottom of the mixing chamber facilitates the discharge of the coated powder product from the mixing chamber into the second accommodating chamber below.
[0019] Preferably, the feed inlet is located at the upper end of the mixing drum, and the feed inlet includes a solid powder feed inlet and a liquid fluid inlet pipe.
[0020] Preferably, the first accommodating cavity and the second accommodating cavity are further provided with an air inlet pipe communicating with the outside, and a filter is installed on the air inlet pipe.
[0021] In this design, by setting up an air inlet pipe, external air can be drawn into the first and second accommodating chambers to generate airflow, allowing the material to tumble up and down in the mixing chamber. A filter is installed to prevent impurities mixed in the air from entering the mixing chamber and affecting the quality of the product.
[0022] Preferably, a filter screen is also provided in the second accommodating cavity below the second propeller blade.
[0023] In this solution, large, adhered particles can be removed by setting up a filter screen, thereby improving the quality of the output product.
[0024] Preferably, a screen slot is provided on the side wall of the stirring cylinder, and the filter screen is installed in the second accommodating cavity through the screen slot;
[0025] And / or, the stirring device further includes a vibrator for vibrating the filter screen.
[0026] In this design, a screen slot is provided on the side wall of the mixing drum, through which the filter screen is installed in the second receiving cavity, facilitating screen replacement. A vibrator is installed to provide vibration during discharge, accelerating the screening and feeding speed of the filter screen.
[0027] Preferably, the bottom of the second accommodating cavity is provided with a discharge port, and the discharge port is provided with an openable and closable cover plate.
[0028] The positive and progressive effects of this utility model are as follows: The stirring device of this utility model generates opposing airflow through two sets of upper and lower propeller blades, which allows the material to tumble up and down in the mixing chamber. The rotating flying knife located in the middle makes the material tumble horizontally. The combination of the above structures can significantly improve the mixing uniformity of the material, so that the liquid is evenly distributed and coats the surface of the solid powder, avoiding the formation of large particles and agglomeration, which would affect the product quality. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the stirring device in an embodiment of the present invention.
[0030] Figure 2 for Figure 1 A partial cross-sectional view of the stirring device.
[0031] Figure 3 for Figure 1 A schematic diagram of the internal structure of the stirring device.
[0032] Figure 4 This is a schematic diagram of the installation of the second propeller blade in an embodiment of this utility model.
[0033] Explanation of reference numerals in the attached figures:
[0034] Agitator 100, solid powder inlet 101, liquid fluid inlet pipe 102, first air inlet pipe 103, second air inlet pipe 104, filter 105, screen slot 106, outlet 107, cover plate 108, mixing chamber 110, lower discharge port 111, first accommodating cavity 120, upper discharge port 121, second accommodating cavity 130, stirring motor 200, stirring shaft 300, first propeller blade 400, second propeller blade 500, mounting base 501, servo motor 502, rotating fly knife 600, mixing rod 700, and filter screen 800. Detailed Implementation
[0035] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0036] like Figures 1-4 As shown, this is a stirring device according to this embodiment. The stirring device includes a stirring drum 100, a stirring shaft 300, and a feed inlet. The stirring shaft 300 is driven to rotate by a stirring motor 200, which can be a variable frequency motor. A stirring chamber 110 is provided in the middle of the stirring drum 100. A first receiving cavity 120 and a second receiving cavity 130 communicating with the stirring chamber 110 are respectively provided above and below the stirring chamber 110. The stirring shaft 300 extends from the first receiving cavity 120 into the second receiving cavity along the axial direction of the stirring drum 100. 130, the feed inlet is connected to the mixing chamber 110, and is used to feed the material to be mixed into the mixing chamber 110; a first propeller blade 400 is installed on the mixing shaft 300 of the first accommodating cavity 120, and the first propeller blade 400 is configured to generate a downward airflow when rotating; a second propeller blade 500 is installed on the mixing shaft 300 of the second accommodating cavity 130, and the second propeller blade 500 is configured to generate an upward airflow when rotating; a rotating blade 600 is installed on the mixing shaft 300 inside the mixing chamber 110.
[0037] The mixing device generates opposing airflow through two sets of upper and lower propeller blades, allowing the material to tumble up and down within the mixing chamber 110. The rotating blade 600 located in the middle further facilitates horizontal tumbling of the material. The combination of these structures significantly improves the uniformity of material mixing, ensuring that the liquid is evenly distributed and coats the surface of the solid powder, preventing the formation of large particles that could agglomerate and affect product quality.
[0038] like Figure 2 As shown, in this embodiment, mixing rods 700 are provided on the inner wall of the mixing drum 100 within the mixing chamber 110, extending towards the mixing shaft 300. Multiple mixing rods 700 are provided, evenly distributed along the circumference of the mixing drum 100. In this embodiment, the mixing rods 700 are cylindrical, with four in total, vertically fixed to the inner wall of the mixing drum 100. By providing the mixing rods 700, large particle clumps caused by uneven liquid distribution during the tumbling process within the mixing chamber 110 are broken up and re-coated, increasing the product qualification rate.
[0039] like Figure 2 As shown, rotating blades 600 are provided above and below the mixing rod 700. In this embodiment, a set of rotating blades 600 is provided above and below the mixing rod 700, and each set of rotating blades 600 has four blades. The blade surfaces are horizontal, and the blade bodies are vertically mounted on the stirring shaft 300. The blades of the upper and lower layers of blades face opposite directions. The mixing rod 700 is provided with a serrated structure. The height of the serrated protrusions decreases in the direction extending towards the stirring shaft 300, and multiple serrated protrusions are distributed on each mixing rod 700. This structure avoids the formation of large particle agglomerates, further improving the liquid phase coating effect and increasing the product qualification rate.
[0040] like Figure 4 As shown, the second propeller blade 500 is mounted on the stirring shaft 300 via a mounting base 501. A servo motor 502 is mounted on the mounting base 501, and the second propeller blade 500 is mounted on the rotation shaft of the servo motor 502. Specifically, in this embodiment, four second propeller blades 500 are provided, each mounted on the stirring shaft 300 via a servo motor 502. With this structure, the deflection angle of the second propeller blade 500 can be changed by the servo motor 502, thereby adjusting the direction and magnitude of the airflow generated by the second propeller blade 500. During mixing, the second propeller blade 500 generates an upward airflow that counteracts the airflow generated by the upper first propeller blade 400. Furthermore, the angle of the lower second propeller blade 500 is greater than that of the upper first propeller blade 400, resulting in a stronger airflow, thus keeping the material in the middle of the mixing position. After mixing is complete, the blade angle of the second propeller blade 500 is reversed to generate a downward airflow, drawing the material downwards to accelerate material discharge.
[0041] like Figure 2 and Figure 3As shown, the bottom of the first accommodating cavity 120 is conical, and the connection between the first accommodating cavity 120 and the mixing chamber 110 is located at the bottom of the conical structure. The bottom of the mixing chamber 110 is also conical, and the connection between the mixing chamber 110 and the second accommodating cavity 130 is located at the bottom of the conical structure. The conical bottom of the first accommodating cavity 120 not only facilitates the downward flow of air generated by the first propeller blade 400 into the mixing chamber 110, but also effectively prevents the powder mixed in the mixing chamber 110 from entering the first accommodating cavity 120. The conical bottom of the mixing chamber 110 also facilitates the discharge of the coated powder product from the mixing chamber 110 into the second accommodating cavity 130 below.
[0042] like Figures 1-3 As shown, in this embodiment, the feed inlet is located at the upper end of the mixing drum 100, and the feed inlet includes a solid powder feed inlet 101 and a liquid fluid inlet pipe 102. In some other embodiments, the feed inlet may also be located on the drum wall at the location of the mixing chamber 110.
[0043] like Figures 1-3 As shown in this embodiment, the first accommodating cavity 120 and the second accommodating cavity 130 are respectively provided with a first air inlet pipe 103 and a second air inlet pipe 104 communicating with the outside. Filters 105 are installed on the first air inlet pipe 103 and the second air inlet pipe 104. By providing air inlet pipes, external air can be drawn into the first accommodating cavity 120 and the second accommodating cavity 130 to generate airflow, thereby allowing the material to tumble up and down in the mixing chamber 110. The filter 105 prevents impurities mixed in the air from entering the mixing chamber 110 and affecting the quality of the product.
[0044] like Figure 2 and Figure 3 As shown, a filter screen 800 is also provided in the second accommodating cavity 130 below the second propeller blade 500. By setting the filter screen 800, large particles that are stuck together can be screened out, thereby improving the quality of the output product.
[0045] like Figure 2 As shown, a screen slot 106 is provided on the side wall of the mixing drum 100, and the filter screen 800 is installed in the second receiving cavity 130 through the screen slot 106. By providing a screen slot 106 on the side wall of the mixing drum 100, and installing the filter screen 800 in the second receiving cavity 130 through the screen slot 106, it is convenient to replace the filter screen 800.
[0046] In this embodiment, the filter screen 800 has a mesh size of 40 and a radially extending notch. When the filter screen 800 is inserted into the mixing drum 100 through the screen slot 106, the notch passes through the mixing shaft 300, preventing the mixing shaft 300 from interfering with the insertion of the filter screen 800. In other embodiments, if the lower end of the mixing shaft 300 does not interfere with the installation of the filter screen 800, the notch may not be provided on the filter screen 800.
[0047] In some embodiments, the mixing device further includes a vibrator for vibrating the filter screen 800. The vibrator may be an ultrasonic vibrator. By providing a vibrator, vibration is provided during discharge to accelerate the screening and discharge speed of the filter screen 800.
[0048] The bottom of the second accommodating cavity 130 is provided with a discharge port 107, and the discharge port 107 is provided with an openable cover plate 108. During the feeding and mixing process, the cover plate 108 of the bottom discharge port 107 is in a closed state, and during the discharge process, the cover plate 108 of the bottom discharge port 107 is in an open state.
[0049] The working principle of the solid-liquid phase mixing and stirring device in this embodiment is as follows:
[0050] Start the stirring motor 200. Solid powder is fed into the solid powder inlet 101, and liquid material is fed into the liquid fluid inlet 102. The airflow generated by the upper first propeller blade 400 flows downwards through the upper discharge port 121 into the middle mixing chamber 110. In the mixing chamber 110, the solid and liquid materials are tumbled laterally by the rotation of the upper and lower rotating blades 600. The lower second propeller blade 500 rotates, generating an upward airflow that counteracts the airflow generated by the upper first propeller blade 400, causing the material to tumble up and down within the mixing chamber 110. After the material is evenly mixed, open the cover 108 of the bottom discharge port 107. The lower second propeller blade 500 rotates at a downward angle, creating a downward airflow that causes the material to flow out from the lower discharge port 111. Large particles are filtered out by the bottom filter screen 800 and discharged from the bottom discharge port 107.
[0051] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A stirring device, comprising a stirring drum, a stirring shaft, and a feed inlet, wherein the stirring shaft is driven to rotate by a motor, characterized in that, The mixing drum has a mixing chamber in the middle. A first accommodating cavity and a second accommodating cavity are respectively provided above and below the mixing chamber and communicate with the mixing chamber. The mixing shaft extends from the first accommodating cavity into the second accommodating cavity along the axial direction of the mixing drum. The feed port communicates with the mixing chamber and is used to feed the material to be mixed into the mixing chamber. The first accommodating cavity has a first propeller blade mounted on its stirring shaft, which is configured to generate a downward airflow when rotating; the second accommodating cavity has a second propeller blade mounted on its stirring shaft, which is configured to generate an upward airflow when rotating; and a rotating blade is mounted on the stirring shaft inside the stirring chamber.
2. The stirring device as described in claim 1, characterized in that, A mixing rod is provided on the inner wall of the mixing drum inside the mixing chamber, and the mixing rod extends toward the mixing shaft.
3. The stirring device as described in claim 2, characterized in that, The rotating flying knife is provided above and below the mixing bar; And / or, the mixing bar is provided with a serrated structure.
4. The stirring device as described in claim 1, characterized in that, The second propeller blade is mounted on the stirring shaft via a mounting base, and a servo motor is provided on the mounting base. The second propeller blade is mounted on the rotating shaft of the servo motor.
5. The stirring device as described in claim 1, characterized in that, The bottom of the first accommodating cavity is a conical structure, and the communication port between the first accommodating cavity and the stirring chamber is located at the bottom of the conical structure; And / or, the bottom of the mixing chamber is a conical structure, and the communication port between the mixing chamber and the second accommodating cavity is located at the bottom of the conical structure.
6. The stirring device as described in claim 1, characterized in that, The feed inlet is located at the upper end of the mixing drum, and the feed inlet includes a solid powder feed inlet and a liquid fluid inlet pipe.
7. The stirring device as described in claim 1, characterized in that, The first accommodating cavity and the second accommodating cavity are also provided with an air inlet pipe that communicates with the outside, and a filter is installed on the air inlet pipe.
8. The stirring device as described in claim 1, characterized in that, A filter screen is also provided in the second accommodating cavity below the second propeller blade.
9. The stirring device as described in claim 8, characterized in that, A screen slot is provided on the side wall of the stirring drum, and the filter screen is installed in the second accommodating cavity through the screen slot; And / or, the stirring device further includes a vibrator for vibrating the filter screen.
10. The stirring device as described in claim 1, characterized in that, The bottom of the second accommodating cavity is provided with a discharge port, and the discharge port is provided with an openable and closable cover plate.